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This was something totally unexpected. Apple has been sending invitations to selected folks for a media event to offer a sneak peek into the next generation iPhone operating system. The invitation reads, “Get a sneak peek into the future of iPhone OS” with a ‘4’ in the background.

We are not sure if a launch date for the same would be announced. That is unlikely considering that would also mean the launch date of iPhone 4G will then be out. However, this could possibly be the shortest time between the launch of one version of the iPhone OS and a sneak peek into the next. The latest version of the iPhone OS, the iPhone OS 3.2 was just launched with the iPad last Saturday.

What do you think is going to be special on the new iPhone OS? There are indications that the next gen iPhone could be called iPhone HD. If that is so, do expect a lot of “revolutionary” and “magical” in Steve Jobs‘ speech this week.